Filter host for channels and playlists search

server/models/shared/query.ts

@@ -0,0 +1,17 @@
+import { BindOrReplacements, QueryTypes } from 'sequelize'
+import { sequelizeTypescript } from '@server/initializers/database'
+
+function doesExist (query: string, bind?: BindOrReplacements) {
+  const options = {
+    type: QueryTypes.SELECT as QueryTypes.SELECT,
+    bind,
+    raw: true
+  }
+
+  return sequelizeTypescript.query(query, options)
+            .then(results => results.length === 1)
+}
+
+export {
+  doesExist
+}